A vibration device includes an internal vibration body to amplify a vibration, a piezoelectric element connected to one end of the internal vibration body, and a light transmission body connected to an another end of the internal vibration body. The vibration device further includes an external vibration body including a first connection portion connected to the light transmission body and a second connection portion extending outward of the light transmission body from the first connection portion to attenuate the vibration.

While 3D ultrasound imaging is becoming a powerful tool in medical field, the main drawback is the difficulty to image large 3D volume, mainly related to the dimensions of the 2D array of transducers. In order to not lose in spatial resolution, it is necessary to use an array of transducers, wherein the size of the transducers does not exceed the wavelength of the ultrasound wave. Such requirement leads to dimensions of array for imaging large 3D volume which are not reachable or at too high cost with the current technology. The present disclosure overcomes the above technology limitation by using greater transducers, and where each transducer has a reception surface with a curved shape or is fitted with an acoustic lens. Such configuration of transducers leads to 2D array of transducers suitable for imaging large 3D volume, as a brain or a heart, with high resolution and high sensitivity.

The present disclosure provides a cleaning robot comprising one or more motors and a controller configured to control the one or more motors to generate acoustic signals indicative of content. The controller is configured to control at least one of a frequency of the acoustic signals and a pulse width of acoustic pulses generated by the one or more motors. The controller may be configured to control the one or more motors to generate an ascending sequence of frequencies and to use a frequency of a pulse generated by the one or more motors to validate a pulse width of the pulse. The one or more motors are configured to transmit frequency tones that indicate bits of a first value within the content. The one or more motors comprise at least one of a pump motor and a drive motor, wherein the controller is configured to control electric power within a motor coil using pulse width modulation to generate the acoustic signals.

Ultrasonic generator (10) including ultrasonic wave generation source (11), ultrasonic wave converging unit (12), and waveguide (13). Ultrasonic wave converging unit having first reflective surface (16) facing the ultrasonic wave generation source and second reflective surface (17) facing the first reflective surface. The first reflective surface reflecting an ultrasonic wave generated by the ultrasonic wave generation source toward the second reflective surface. The second reflective surface reflecting the ultrasonic wave reflected by the first reflective surface toward the waveguide to introduce the ultrasonic wave into the waveguide. The waveguide being a member separate from the ultrasonic wave converging unit and joined to the ultrasonic wave converging unit in joining section (22). The joining section being disposed in a region on an inner peripheral side of a region (R) obtained by extending outer peripheral edge (11B) of the ultrasonic wave generation source in a facing direction.

The present disclosure provides an aerosol delivery device that may comprise a housing defining an outer wall and further including a power source and a control component. The device also includes a mouthpiece portion that defines an exit aerosol path, a tank portion that includes a reservoir configured to contain a liquid composition, and an atomization assembly configured to vaporize the liquid composition to generate an aerosol. The atomization assembly includes a mesh plate and a vibrating component, wherein the mesh plate and the vibrating component are configured to be separable from each other at a detachable interface. The detachable interface may be located at various locations of the device, including between the mouthpiece portion and the tank portion, within the mouthpiece portion, within the tank portion, within a separable atomization assembly, within a cartridge, within a control unit, or between a cartridge and a control unit.

Disclosed herein are an acoustic output device, including: a housing; a driving unit, the driving unit being accommodated in the housing, the driving unit vibrating to generate sound and outputting the sound through a sound outlet hole provided on the housing; a draining member provided at the sound outlet hole; and an ultrasound transmitting module configured to output an ultrasound excitation signal. The draining member includes an oscillation unit and a plurality of holes. The plurality of holes include a plurality of sound passage holes that allow sound transmission. And the oscillation unit is configured to generate an ultrasonic oscillation in response to the ultrasound excitation signal to discharge liquids at and near the sound passage holes.

An electroacoustic device for generating an acoustic wave includes: a piezoelectric substrate; first electrodes arranged on the piezoelectric substrate, each first electrode including first tracks that spiral around a spiral axis in a first winding direction; and second electrodes arranged on the piezoelectric substrate, each second electrode including second tracks that spiral around the spiral axis in a second winding direction opposite to the first winding direction.

Aspects of this disclosure relate to driving a capacitive micromachined ultrasonic transducer (CMUT) with a pulse train of unipolar pulses. The CMUT may be electrically excited with a pulse train of unipolar pulses such that the CMUT operates in a continuous wave mode. In some embodiments, the CMUT may have a contoured electrode.

A system comprises a support, typically part of dishwashing machine or clothes washing machine, having a plurality of piezoelectric transducers. Each transducer can have a cylindrical housing with a water inlet along a side surface of the housing. The transducers can also comprise a lens and a piezoelectric material with electrodes configured to couple to a power supply.

Ultrasound energy therapy devices, systems, and methods for the treatment of a condition via neuromodulation of a nerve in a tissue, such as a spleen or liver. A therapy device having a transducer array configured to transmit ultrasound energy to the spleen or liver for neuromodulation. One or more transducers configured to transmit and receive ultrasound energy to detect the presence of bone or air between the spleen or liver and the therapy device. Detection of an obstruction can be used to guide an operator to adjust the alignment of the therapy device with the skeletal structure of the patient to minimize reflection of the energy transmitted from the transducer array to the spleen or liver.